Striborg is a black metal/ambient band from Tasmania. Its sole member, Russell Menzies, began Striborg in 1994 under the stage name "Sin Nanna". He has also recorded under the names Kathaaria and Veil of Darkness. Sin Nanna recorded and released demos on a yearly basis until 2004, when his first studio album was released. His lyrics reveal a fascination with forests, darkness, night, misanthropy and death. The names 'Striborg' and 'Sin Nanna' are the names of a Slavonic wind god (which is really spelled 'Stribog') and Mesopotamian moon god, respectively.

In May 2007 Sunn O))) did a Pacific Rim tour with a guest lineup consisting of Oren Ambarchi and Attila Csihar. However upon their arrival in Melbourne, Australia they joined with Sin Nanna for an improvisational performance. The makeshift group took up the name Pentemple and released one live album titled "0))) Presents...".[5]

In January 2014 Striborg played live in the MONA FOMA music festival playing a new song titled "Purifying the River of Tears".[6]
In June 2014 Sin Nanna performed live as Veil of Darkness for the first time supporting Sunn O))) as part of the Dark MOFO festival.[7] He also played an unannounced set as Striborg on the final night of the festival.

Until 2010, contact with Sin Nanna has been limited to online interviews via email exchange. Despite Sin Nanna's very anti social and misanthropic view of society, he agreed to take part in the Vice documentary One Man Metal, in which he further proved his eccentric lifestyle.